BBMF @ Stafford 15/9 + alot of flypasts

All,

I noticed a NOTAM for MOD Stafford which has a BBMF Spitfire pass later today, when I looked at the schedule its a really busy day for Flypasts at a number of bases. Does anyone know the significance of this if any? I did find this whilst searching – 1940 Climax of the Battle of Britain, tide turns as Luftwaffe lose 56 aircraft, RAF 28?

Thursday 15th September 2016

12:40 BBMF Departure [Spitfire] (RAF Coningsby)
13:00 BBMF Flypast [Hurricane] (Birstall, Leicestershire)
13:10 BBMF Departure [Spitfire] (RAF Coningsby)
13:30 BBMF Flypast [Spitfire] (Leaconfield, East Riding of Yorkshire)
13:30 BBMF Flypast (NOTAM) (Watchfield. Oxfordshire)
13:30 BBMF Flypast (BBMF Timetable) [Spitfire] (Shrivenham Defence Academy)
13:35 BBMF Arrival [Spitfire] (Kemble Airfield)
13:55 BBMF Arrival [Spitfire] (RAF Coningsby)
18:00 BBMF Departure [Spitfire] (RAF Coningsby)
18:15 BBMF Departure [Hurricane] (RAF Coningsby)
18:25 BBMF Departure [Spitfire] (Kemble Airfield)
18:25 BBMF Flypast [Spitfire] (MOD Stafford, Staffordshire)
18:30 BBMF Flypast [Spitfire] (Imjin Barracks, Innsworth, Gloucestershire)
18:35 BBMF Flypast [Spitfire] (RAF Shawbury. Shropshire)
18:40 BBMF Flypast [Hurricane] (RAF Henlow, Bedfordshire)
18:40 BBMF Flypast [Spitfire] (RAF Brize Norton, Oxfordshire)
18:50 BBMF Flypast [Spitfire] (RAF Cosford, Shropshire)
18:50 BBMF Flypast [Hurricane] (RAF Wyton, Cambridgeshire)
18:55 BBMF Flypast [Spitfire] (RAF Benson, Oxfordshire)
19:00 BBMF Flypast [Hurricane] (RAF Wittering, Cambridgeshire)
19:00 BBMF Flypast [Spitfire] (RAF Coningsby)
19:05 BBMF Arrival [Spitfire] (RAF Coningsby)
19:05 BBMF Flypast [Spitfire] (Halton Aerodrome, Buckinghamshire)
19:15 BBMF Flypast [Hurricane] (Digby, Lincolnshire)
19:15 BBMF Flypast [Spitfire] (High Wycombe, Buckinghamshire)
19:20 BBMF Flypast [Spitfire] (RAF Northolt, London)
19:22 BBMF Flypast [Spitfire] (RAF Coningsby)
19:25 BBMF Arrival [Hurricane] (RAF Coningsby)
19:30 BBMF Arrival [Spitfire] (White Waltham Airfield)